"The Youth Olympic Games (YOG) is an international multi-sport eventorganized
by the IOC. The games are held every four
years in staggered summer and winter events consistent with the current
Olympic Games format. The first summer version was held in Singapore from 14 to 26 August 2010
while the first winter version was held in Innsbruck, Austria from 13 to 22
January 2012. The age limitation of the athletes is 14 to 18.The idea of
such an event was introduced by Austrian industrial manager Johann
Rosenzopf in 1998. The concept of the Youth Olympic Games was envisioned in
response to growing global concerns about childhood obesity and the
dropping participation of youth in sport activities, especially amongst
youth in developed nations.Besides, in order to improve the students'
academic performance, schools are dropping sports and physical education
from their curriculums. It was further recognized that a youth version of
the Olympic Games would help foster participations in the Olympic Games. On
6 July 2007, International Olympic Committee (IOC) members at the 119th IOC
session in Guatemala City
approved the creation of a youth version of the Olympic Games. The YOG are
a successor to the discontinued World Youth Games. The purpose of the World
Youth Games was to The main objectives of the first World Youth Games were
to involve the young participants in the Olympic movement and promote the
Olympic spirit of friendship and mutual understanding among peoples,
preparing their psychological and aptitude conditions for international
starts and also selecting young talents for the participation in future
Olympic Games." Sources:http://en.wikipedia.org/wiki/Youth_Olympic_Games and
http://en.wikipedia.org/wiki/World_Youth_Games
The official logo of the YOG is:
http://en.wikipedia.org/wiki/File:Youth_Olympic_Games.svg

It seems that also almost all (if not all) bids had a logo and a flag as
well, so here they are (at least to mention the candidate cities, pending
on further research for the flags). "Eleven cities expressed interest in
hosting the Games, nine of which ultimately applied. Five cities amongst
the nine were selected for the shortlist: Athens (official bid website),
Bangkok, Moscow,
Singapore, and Turin. The list was further shortened
to two finalists, Singapore and Moscow" Source:http://en.wikipedia.org/wiki/Singapore_2010

The 2012 Winter Youth Olympics, officially known as the I Winter Youth
Olympic Games were awarded to Innsbruck. On 2 September 2008 IOC announced
that the executive board had shortlisted four cities among the candidates
to host the first Winter Youth Olympic Games in 2012. The four candidate
cities were Harbin, Innsbruck, Kuopio, and Lillehammer. The
list was then shortened to two finalists, Innsbruck and Kuopio, in November
2008. On 12 December 2008, it was announced that Innsbruck beat Kuopio to
host the games.Sources:http://en.wikipedia.org/wiki/Youth_Olympic_Games and
http://en.wikipedia.org/wiki/2012_Winter_Youth_Olympics
For additional information on the First Winter YOG, go to:
Innsbruck 2012 (official website)Esteban Rivera, 05 January 2014